Classic Edition: Stylish Design & Comfortable watch band: 46mm hand-polished round watch case with 2.5D curved glass & Fluroelastomer band which is comfortable to wear. Seamless Connection: Bluetooth 5.0, hand-free calls, message notification, music control, find your phone, remote camera etc. Warp Charging: Good battery life combines with Warp Charge, gives you a day‘s power in 5 mins, or a week’s power in 20 mins. Smartphone-Free Music: 4GB standalone storage to hold up to 500 songs & Compatible with OnePlus TWS/TWSZ and other Bluetooth earbuds . Workout Partner : 110+ workout types, 5ATM + IP 68 water and dust resistance, automatic workout detections for jogging, running & swimming posture recognition . Specifications Brand: OnePlus Model Name: ‎ Watch W301GB Color: Midnight Black, Moonlight Silver Battery Life: Up to 5 days (120 hours in power-saving mode) Display: 1.43-inch AMOLED, 1000 nits brightness Design: Stainless steel chassis, titanium alloy bezel, sapphire crystal Health Features: ECG, heart rate, blood oxygen, sleep tracking, 60-second health check-up Connectivity: Bluetooth 5.0, Wi-Fi 5G/2.4G Water Resistance: 5ATM, IP68 OS: Wear OS 4 Performance: Dual chipset (Snapdragon W5 & BES2800 efficiency chip)